Problem Name | Online Judge | Year | Contest | Difficulty Level | |
---|---|---|---|---|---|

1 | Spreadsheet | Codeforces | Codeforces Beta Round #1 | 1 | |

2 | Before an Exam | Codeforces | Codeforces Beta Round #4 (Div. 2 Only) | 1 | |

3 | Borze | Codeforces | Codeforces Beta Round #32 (Div. 2, Codeforces format) | 1 | |

4 | Sale | Codeforces | Codeforces Beta Round #34 (Div. 2) | 1 | |

5 | Present from Lena | Codeforces | Codeforces Beta Round #89 (Div. 2) | 1 | |

6 | Drinks | Codeforces | Codeforces Round #126 (Div. 2) | 1 | |

7 | T-primes | Codeforces | Codeforces Round #142 (Div. 2) | 1 | |

8 | Roadside Trees (Simplified Edition) | Codeforces | Codeforces Round #162 (Div. 2) | 1 | |

9 | Queue at the School | Codeforces | Codeforces Round #163 (Div. 2) | 1 | |

10 | Buttons | Codeforces | Codeforces Round #164 (Div. 2) | 1 | |

11 | Little Girl and Game | Codeforces | Codeforces Round #169 (Div. 2) | 1 | |

12 | Books | Codeforces | Codeforces Round #171 (Div. 2) | 1 | |

13 | Ilya and Queries | Codeforces | Codeforces Round #186 (Div. 2) | 1 | |

14 | Hungry Sequence | Codeforces | Codeforces Round #191 (Div. 2) | 1 | |

15 | Road Construction | Codeforces | Codeforces Round #192 (Div. 2) | 1 | |

16 | Xenia and Ringroad | Codeforces | Codeforces Round #197 (Div. 2) | 1 | |

17 | Fence | Codeforces | Codeforces Round #211 (Div. 2) | 1 | |

18 | Sereja and Suffixes | Codeforces | Codeforces Round #215 (Div. 2) | 1 | |

19 | Prison Transfer | Codeforces | Codeforces Round #244 (Div. 2) | 1 | |

20 | Kuriyama Mirai's Stones | Codeforces | Codeforces Round #248 (Div. 2) | 1 | |

21 | Devu, the Dumb Guy | Codeforces | Codeforces Round #251 (Div. 2) | 1 | |

22 | DZY Loves Strings | Codeforces | Codeforces Round #255 (Div. 2) | 1 | |

23 | Suffix Structures | Codeforces | Codeforces Round #256 (Div. 2) | 1 | |

24 | Jzzhu and Sequences | Codeforces | Codeforces Round #257 (Div. 2) | 1 | |

25 | Sort the Array | Codeforces | Codeforces Round #258 (Div. 2) | 1 | |

26 | Little Pony and Sort by Shift | Codeforces | Codeforces Round #259 (Div. 2) | 1 | |

27 | Fedya and Maths | Codeforces | Codeforces Round #260 (Div. 2) | 1 | |

28 | Pashmak and Flowers | Codeforces | Codeforces Round #261 (Div. 2) | 1 | |

29 | Caisa and Pylons | Codeforces | Codeforces Round #264 (Div. 2) | 1 | |

30 | Inbox (100500) | Codeforces | Codeforces Round #265 (Div. 2) | 1 | |

31 | Fedor and New Game | Codeforces | Codeforces Round #267 (Div. 2) | 1 | |

32 | Worms | Codeforces | Codeforces Round #271 (Div. 2) | 1 | |

33 | Dreamoon and WiFi | Codeforces | Codeforces Round #272 (Div. 2) | 1 | |

34 | Random Teams | Codeforces | Codeforces Round #273 (Div. 2) | 1 | |

35 | OR in Matrix | Codeforces | Codeforces Round #277 (Div. 2) | 1 | |

36 | BerSU Ball | Codeforces | Codeforces Round #277.5 (Div. 2) | 1 | |

37 | Vanya and Lanterns | Codeforces | Codeforces Round #280 (Div. 2) | 1 | |

38 | Lecture | Codeforces | Codeforces Round #284 (Div. 2) | 1 | |

39 | Misha and Changing Handles | Codeforces | Codeforces Round #285 (Div. 2) | 1 | |

40 | Amr and Pins | Codeforces | Codeforces Round #287 (Div. 2) | 1 | |

41 | Anton and currency you all know | Codeforces | Codeforces Round #288 (Div. 2) | 1 | |

42 | Han Solo and Lazer Gun | Codeforces | Codeforces Round #291 (Div. 2) | 1 | |

43 | A and B and Compilation Errors | Codeforces | Codeforces Round #294 (Div. 2) | 1 | |

44 | Two Buttons | Codeforces | Codeforces Round #295 (Div. 2) | 1 | |

45 | Tavas and SaDDas | Codeforces | Codeforces Round #299 (Div. 2) | 1 | |

46 | Quasi Binary | Codeforces | Codeforces Round #300 | 1 | |

47 | Equidistant String | Codeforces | Codeforces Round #303 (Div. 2) | 1 | |

48 | Soldier and Badges | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |

49 | Preparing Olympiad | Codeforces | Codeforces Round #306 (Div. 2) | 1 | |

50 | Vanya and Books | Codeforces | Codeforces Round #308 (Div. 2) | 1 | |

51 | Berland National Library | Codeforces | Codeforces Round #Pi (Div. 2) | 1 | |

52 | Simple Game | Codeforces | Codeforces Round #316 (Div. 2) | 1 | |

53 | Kefa and Company | Codeforces | Codeforces Round #321 (Div. 2) | 1 | |

54 | Luxurious Houses | Codeforces | Codeforces Round #322 (Div. 2) | 1 | |

55 | Robot's Task | Codeforces | Codeforces Round #323 (Div. 2) | 1 | |

56 | Duff in Love | Codeforces | Codeforces Round #326 (Div. 2) | 1 | |

57 | The Monster and the Squirrel | Codeforces | Codeforces Round #328 (Div. 2) | 1 | |

58 | Wilbur and Array | Codeforces | Codeforces Round #331 (Div. 2) | 1 | |

59 | Chocolate | Codeforces | Codeforces Round #340 (Div. 2) | 1 | |

60 | Wet Shark and Bishops | Codeforces | Codeforces Round #341 (Div. 2) | 1 | |

61 | Beautiful Paintings | Codeforces | Codeforces Round #345 (Div. 2) | 1 | |

62 | Game of Robots | Codeforces | Codeforces Round #350 (Div. 2) | 1 | |

63 | Different is Good | Codeforces | Codeforces Round #352 (Div. 2) | 1 | |

64 | Bear and Finding Criminals | Codeforces | Codeforces Round #356 (Div. 2) | 1 | |

65 | Alyona and Mex | Codeforces | Codeforces Round #358 (Div. 2) | 1 | |

66 | Lovely Palindromes | Codeforces | Codeforces Round #360 (Div. 2) | 1 | |

67 | Cells Not Under Attack | Codeforces | Codeforces Round #364 (Div. 2) | 1 | |

68 | Spider Man | Codeforces | Codeforces Round #366 (Div. 2) | 1 | |

69 | Interesting drink | Codeforces | Codeforces Round #367 (Div. 2) | 1 | |

70 | Bakery | Codeforces | Codeforces Round #368 (Div. 2) | 1 | |

71 | Chris and Magic Square | Codeforces | Codeforces Round #369 (Div. 2) | 1 | |

72 | Memory and Trident | Codeforces | Codeforces Round #370 (Div. 2) | 1 | |

73 | Filya and Homework | Codeforces | Codeforces Round #371 (Div. 2) | 1 | |

74 | Complete the Word | Codeforces | Codeforces Round #372 (Div. 2) | 1 | |

75 | Passwords | Codeforces | Codeforces Round #374 (Div. 2) | 1 | |

76 | Text Document Analysis | Codeforces | Codeforces Round #375 (Div. 2) | 1 | |

77 | Arrival of the General | Codeforces | Codeforces Round #103 (Div. 2) | 1 | |

78 | Cormen --- The Best Friend Of a Man | Codeforces | Codeforces Round #377 (Div. 2) | 1 | |

79 | Parade | Codeforces | Codeforces Round #378 (Div. 2) | 1 | |

80 | Anton and Digits | Codeforces | Codeforces Round #379 (Div. 2) | 1 | |

81 | Soldier and Bananas | Codeforces | Codeforces Round #304 (Div. 2) | 1 | |

82 | Decoding | Codeforces | Codeforces Round #386 (Div. 2) | 1 | |

83 | Chloe and the sequence | Codeforces | Codeforces Round #384 (Div. 2) | 1 | |

84 | Blown Garland | Codeforces | Codeforces Round #392 (Div. 2) | 1 | |

85 | Tetrahedron | Codeforces | Codeforces Round #113 (Div. 2) | 1 | |

86 | Mahmoud and a Triangle | Codeforces | Codeforces Round #396 (Div. 2) | 1 | |

87 | Timofey and cubes | Codeforces | Codeforces Round #395 (Div. 2) | 1 | |

88 | Sherlock and his girlfriend | Codeforces | ICM Technex 2017 and Codeforces Round #400 (Div. 1 + Div. 2, combined) | 1 | |

89 | Weird Rounding | Codeforces | Codeforces Round #402 (Div. 2) | 1 | |

90 | Anton and Classes | Codeforces | Codeforces Round #404 (Div. 2) | 1 | |

91 | 3-palindrome | Codeforces | Codeforces Round #411 (Div. 2) | 1 | |

92 | Bear and Elections | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) | 1 | |

93 | Godsend | Codeforces | Codeforces Round #429 (Div. 2) | 1 | |

94 | The number on the board | Codeforces | Codeforces Round #427 (Div. 2) | 1 | |

95 | Keyboard Layouts | Codeforces | Codeforces Round #424 (Div. 2, rated, based on VK Cup Finals) | 1 | |

96 | Crossword solving | Codeforces | Codeforces Round #422 (Div. 2) | 1 | |

97 | The Eternal Immortality | Codeforces | Codeforces Round #439 (Div. 2) | 1 | |

98 | Hamster Farm | Codeforces | Codeforces Round #464 (Div. 2) | 1 | |

99 | Towers | Codeforces | Codeforces Beta Round #37 | 1 | |

100 | Registration System | Codeforces | Codeforces Beta Round #4 (Div. 2 Only) | 1 | |

101 | Jzzhu and Children | Codeforces | Codeforces Round #257 (Div. 2) | 1 | |

102 | Cards | Codeforces | Codeforces Round #364 (Div. 2) | 1 | |

103 | Coins | Codeforces | Codeforces Beta Round #54 (Div. 2) | 2 | |

104 | Petya and Countryside | Codeforces | Codeforces Beta Round #61 (Div. 2) | 2 | |

105 | Lucky Numbers (easy) | Codeforces | Codeforces Beta Round #77 (Div. 2 Only) | 2 | |

106 | Sum of Digits | Codeforces | Codeforces Beta Round #79 (Div. 2 Only) | 2 | |

107 | Little Pigs and Wolves | Codeforces | Codeforces Beta Round #87 (Div. 2 Only) | 2 | |

108 | Lucky Substring | Codeforces | Codeforces Beta Round #91 (Div. 2 Only) | 2 | |

109 | Opposites Attract | Codeforces | Codeforces Beta Round #95 (Div. 2) | 2 | |

110 | Permutation | Codeforces | Codeforces Beta Round #98 (Div. 2) | 2 | |

111 | Combination | Codeforces | Codeforces Round #109 (Div. 2) | 2 | |

112 | Trace | Codeforces | Codeforces Round #110 (Div. 2) | 2 | |

113 | Unlucky Ticket | Codeforces | Codeforces Round #111 (Div. 2) | 2 | |

114 | Burning Midnight Oil | Codeforces | Codeforces Round #112 (Div. 2) | 2 | |

115 | Airport | Codeforces | Codeforces Round #134 (Div. 2) | 2 | |

116 | Effective Approach | Codeforces | Codeforces Round #140 (Div. 2) | 2 | |

117 | Big Segment | Codeforces | Codeforces Round #149 (Div. 2) | 2 | |

118 | Increase and Decrease | Codeforces | Codeforces Round #151 (Div. 2) | 2 | |

119 | Little Elephant and Magic Square | Codeforces | Codeforces Round #157 (Div. 2) | 2 | |

120 | Squares | Codeforces | Codeforces Round #161 (Div. 2) | 2 | |

121 | Prime Matrix | Codeforces | Codeforces Round #166 (Div. 2) | 2 | |

122 | Painting Eggs | Codeforces | Codeforces Round #173 (Div. 2) | 2 | |

123 | Find Marble | Codeforces | Codeforces Round #175 (Div. 2) | 2 | |

124 | Polo the Penguin and Matrix | Codeforces | Codeforces Round #177 (Div. 2) | 2 | |

125 | Sail | Codeforces | Codeforces Round #180 (Div. 2) | 2 | |

126 | Archer | Codeforces | Codeforces Round #185 (Div. 2) | 2 | |

127 | Strings of Power | Codeforces | Codeforces Round #188 (Div. 2) | 2 | |

128 | Ciel and Flowers | Codeforces | Codeforces Round #190 (Div. 2) | 2 | |

129 | Simple Molecules | Codeforces | Codeforces Round #200 (Div. 2) | 2 | |

130 | Fixed Points | Codeforces | Codeforces Round #201 (Div. 2) | 2 | |

131 | Color the Fence | Codeforces | Codeforces Round #202 (Div. 2) | 2 | |

132 | Jeff and Periods | Codeforces | Codeforces Round #204 (Div. 2) | 2 | |

133 | Petya and Staircases | Codeforces | Codeforces Round #212 (Div. 2) | 2 | |

134 | The Fibonacci Segment | Codeforces | Codeforces Round #213 (Div. 2) | 2 | |

135 | Bear and Strings | Codeforces | Codeforces Round #226 (Div. 2) | 2 | |

136 | George and Round | Codeforces | Codeforces Round #227 (Div. 2) | 2 | |

137 | Fox and Cross | Codeforces | Codeforces Round #228 (Div. 2) | 2 | |

138 | Football Kit | Codeforces | Codeforces Round #246 (Div. 2) | 2 | |

139 | Shower Line | Codeforces | Codeforces Round #247 (Div. 2) | 2 | |

140 | DZY Loves Chemistry | Codeforces | Codeforces Round #254 (Div. 2) | 2 | |

141 | Little Dima and Equation | Codeforces | Codeforces Round #262 (Div. 2) | 2 | |

142 | Appleman and Card Game | Codeforces | Codeforces Round #263 (Div. 2) | 2 | |

143 | Chat Online | Codeforces | Codeforces Round #268 (Div. 2) | 2 | |

144 | MUH and Important Things | Codeforces | Codeforces Round #269 (Div. 2) | 2 | |

145 | Design Tutorial: Learn from Life | Codeforces | Codeforces Round #270 | 2 | |

146 | Towers | Codeforces | Codeforces Round #274 (Div. 2) | 2 | |

147 | Valuable Resources | Codeforces | Codeforces Round #276 (Div. 2) | 2 | |

148 | Vasya and Wrestling | Codeforces | Codeforces Round #281 (Div. 2) | 2 | |

149 | Mr. Kitayuta's Colorful Graph | Codeforces | Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) & Codeforces Round #286 (Div. 1) & Codeforces Round #286 (Div. 2) | 2 | |

150 | Painting Pebbles | Codeforces | Codeforces Round #289 (Div. 2, ACM ICPC Rules) | 2 | |

151 | Fox And Two Dots | Codeforces | Codeforces Round #290 (Div. 2) | 2 | |

152 | Drazil and His Happy Friends | Codeforces | Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) & Codeforces Round #292 (Div. 1) & Codeforces Round #292 (Div. 2) | 2 | |

153 | Tanya and Postcard | Codeforces | Codeforces Round #293 (Div. 2) | 2 | |

154 | Pasha and String | Codeforces | Codeforces Round #297 (Div. 2) | 2 | |

155 | Covered Path | Codeforces | Codeforces Round #298 (Div. 2) | 2 | |

156 | Sea and Islands | Codeforces | Codeforces Round #302 (Div. 2) | 2 | |

157 | Mike and Fun | Codeforces | Codeforces Round #305 (Div. 2) | 2 | |

158 | Ohana Cleans Up | Codeforces | Codeforces Round #309 (Div. 2) | 2 | |

159 | Case of Fake Numbers | Codeforces | Codeforces Round #310 (Div. 2) | 2 | |

160 | Pasha and Tea | Codeforces | Codeforces Round #311 (Div. 2) | 2 | |

161 | Amr and The Large Array | Codeforces | Codeforces Round #312 (Div. 2) | 2 | |

162 | Gerald is into Art | Codeforces | Codeforces Round #313 (Div. 2) | 2 | |

163 | Inventory | Codeforces | Codeforces Round #315 (Div. 2) | 2 | |

164 | Bear and Three Musketeers | Codeforces | Codeforces Round #318 [RussianCodeCup Thanks-Round] (Div. 2) | 2 | |

165 | Modulo Sum | Codeforces | Codeforces Round #319 (Div. 2) | 2 | |

166 | Kolya and Tanya | Codeforces | Codeforces Round #324 (Div. 2) | 2 | |

167 | Laurenty and Shop | Codeforces | Codeforces Round #325 (Div. 2) | 2 | |

168 | Rebranding | Codeforces | Codeforces Round #327 (Div. 2) | 2 | |

169 | Approximating a Constant Range | Codeforces | Codeforces Round #333 (Div. 2) | 2 | |

170 | More Cowbell | Codeforces | Codeforces Round #334 (Div. 2) | 2 | |

171 | Vika and Squares | Codeforces | Codeforces Round #337 (Div. 2) | 2 | |

172 | Gena's Code | Codeforces | Codeforces Round #339 (Div. 2) | 2 | |

173 | War of the Corporations | Codeforces | Codeforces Round #342 (Div. 2) | 2 | |

174 | Far Relative’s Problem | Codeforces | Codeforces Round #343 (Div. 2) | 2 | |

175 | Print Check | Codeforces | Codeforces Round #344 (Div. 2) | 2 | |

176 | Qualifying Contest | Codeforces | Codeforces Round #346 (Div. 2) | 2 | |

177 | Little Artem and Grasshopper | Codeforces | VK Cup 2016 - Round 2 | 2 | |

178 | Restoring Painting | Codeforces | Codeforces Round #353 (Div. 2) | 2 | |

179 | Vanya and Food Processor | Codeforces | Codeforces Round #355 (Div. 2) | 2 | |

180 | Economy Game | Codeforces | Codeforces Round #357 (Div. 2) | 2 | |

181 | Little Robber Girl's Zoo | Codeforces | Codeforces Round #359 (Div. 2) | 2 | |

182 | Barnicle | Codeforces | Codeforces Round #362 (Div. 2) | 2 | |

183 | One Bomb | Codeforces | Codeforces Round #363 (Div. 2) | 2 | |

184 | Mishka and trip | Codeforces | Codeforces Round #365 (Div. 2) | 2 | |

185 | Anatoly and Cockroaches | Codeforces | Codeforces Round #373 (Div. 2) | 2 | |

186 | Coupons and Discounts | Codeforces | Codeforces Round #376 (Div. 2) | 2 | |

187 | Divisibility | Codeforces | Experimental Educational Round: VolBIT Formulas Blitz | 2 | |

188 | Alyona and flowers | Codeforces | Codeforces Round #381 (Div. 2) | 2 | |

189 | Urbanization | Codeforces | Codeforces Round #382 (Div. 2) | 2 | |

190 | Arpa’s obvious problem and Mehrdad’s terrible solution | Codeforces | Codeforces Round #383 (Div. 2) | 2 | |

191 | Parallelogram is Back | Codeforces | Codeforces Round #388 (Div. 2) | 2 | |

192 | Mammoth's Genome Decoding | Codeforces | Codeforces Round #387 (Div. 2) | 2 | |

193 | Bash's Big Day | Codeforces | Codecraft-17 and Codeforces Round #391 (Div. 1 + Div. 2, combined) | 2 | |

194 | Ilya and tic-tac-toe game | Codeforces | Codeforces Round #390 (Div. 2) | 2 | |

195 | Dasha and friends | Codeforces | Codeforces Round #394 (Div. 2) | 2 | |

196 | Code obfuscation | Codeforces | Codeforces Round #397 by Kaspersky Lab and Barcelona Bootcamp (Div. 1 + Div. 2 combined) | 2 | |

197 | Game of Credit Cards | Codeforces | Codeforces Round #401 (Div. 2) | 2 | |

198 | Bear and Friendship Condition | Codeforces | VK Cup 2017 - Round 1 | 2 | |

199 | Not Afraid | Codeforces | Codeforces Round #406 (Div. 2) | 2 | |

200 | Find The Bone | Codeforces | Codeforces Round #408 (Div. 2) | 2 | |

201 | Vladik and Complicated Book | Codeforces | Codeforces Round #416 (Div. 2) | 2 | |

202 | Summer sell-off | Codeforces | Codeforces Round #415 (Div. 2) | 2 | |

203 | Mike and strings | Codeforces | Codeforces Round #410 (Div. 2) | 2 | |

204 | Valued Keys | Codeforces | Codeforces Round #409 (rated, Div. 2, based on VK Cup 2017 Round 2) | 2 | |

205 | Karen and Coffee | Codeforces | Codeforces Round #419 (Div. 2) | 2 | |

206 | The Festive Evening | Codeforces | Codeforces Round #426 (Div. 2) | 2 | |

207 | Okabe and Banana Trees | Codeforces | Codeforces Round #420 (Div. 2) | 2 | |

208 | An express train to reveries | Codeforces | Codeforces Round #418 (Div. 2) | 2 | |

209 | Polycarp and Letters | Codeforces | Codeforces Round #436 (Div. 2) | 2 | |

210 | Divisiblity of Differences | Codeforces | Codeforces Round #441 (Div. 2, by Moscow Team Olympiad) | 2 | |

211 | Maximum of Maximums of Minimums | Codeforces | Technocup 2018 - Elimination Round 2 | 2 | |

212 | Beautiful Divisors | Codeforces | Educational Codeforces Round 33 (Rated for Div. 2) | 2 | |

213 | Proper Nutrition | Codeforces | Codeforces Round #451 (Div. 2) | 2 | |

214 | Magic Forest | Codeforces | Codeforces Round #461 (Div. 2) | 2 | |

215 | Repeated Substitution with Sed | Live Archive | 2009 | Asia - Tokyo | 2 |

216 | The least round way | Codeforces | Codeforces Beta Round #2 | 3 | |

217 | President's Office | Codeforces | Codeforces Beta Round #6 (Div. 2 Only) | 3 | |

218 | Correct Solution? | Codeforces | Codeforces Beta Round #12 (Div 2 Only) | 3 | |

219 | Burglar and Matches | Codeforces | Codeforces Beta Round #16 (Div. 2 Only) | 3 | |

220 | Phone numbers | Codeforces | Codeforces Beta Round #25 (Div. 2 Only) | 3 | |

221 | Regular Bracket Sequence | Codeforces | Codeforces Beta Round #26 (Codeforces format) | 3 | |

222 | Letter | Codeforces | Codeforces Beta Round #42 (Div. 2) | 3 | |

223 | Easter Eggs | Codeforces | Codeforces Beta Round #70 (Div. 2) | 3 | |

224 | Testing Pants for Sadness | Codeforces | Codeforces Beta Round #80 (Div. 1 Only) & Codeforces Beta Round #80 (Div. 2 Only) | 3 | |

225 | Lucky String | Codeforces | Codeforces Beta Round #84 (Div. 2 Only) | 3 | |

226 | Canvas Frames | Codeforces | Codeforces Beta Round #93 (Div. 2 Only) | 3 | |

227 | Students and Shoelaces | Codeforces | Codeforces Beta Round #94 (Div. 2 Only) | 3 | |

228 | Unary | Codeforces | Codeforces Beta Round #96 (Div. 2) | 3 | |

229 | Ternary Logic | Codeforces | Codeforces Beta Round #97 (Div. 2) | 3 | |

230 | Phone Numbers | Codeforces | Codeforces Round #107 (Div. 2) | 3 | |

231 | Vasya's Calendar | Codeforces | Codeforces Round #117 (Div. 2) | 3 | |

232 | Little Elephant and Numbers | Codeforces | Codeforces Round #136 (Div. 2) | 3 | |

233 | Cosmic Tables | Codeforces | Codeforces Round #137 (Div. 2) | 3 | |

234 | Array | Codeforces | Codeforces Round #138 (Div. 2) | 3 | |

235 | Non-square Equation | Codeforces | Codeforces Round #144 (Div. 2) | 3 | |

236 | Reading | Codeforces | Codeforces Round #145 (Div. 2, ACM-ICPC Rules) | 3 | |

237 | Easy Number Challenge | Codeforces | Codeforces Round #146 (Div. 2) | 3 | |

238 | Physics Practical | Codeforces | Codeforces Round #154 (Div. 2) | 3 | |

239 | Code Parsing | Codeforces | Codeforces Round #156 (Div. 2) | 3 | |

240 | Playing Cubes | Codeforces | Codeforces Round #159 (Div. 2) | 3 | |

241 | Roma and Changing Signs | Codeforces | Codeforces Round #160 (Div. 2) | 3 | |

242 | Multithreading | Codeforces | Codeforces Round #165 (Div. 2) | 3 | |

243 | Cows and Poker Game | Codeforces | Codeforces Round #174 (Div. 2) | 3 | |

244 | Coach | Codeforces | Codeforces Round #181 (Div. 2) | 3 | |

245 | Eugeny and Play List | Codeforces | Codeforces Round #182 (Div. 2) | 3 | |

246 | Sereja and Array | Codeforces | Codeforces Round #187 (Div. 2) | 3 | |

247 | Ping-Pong (Easy Version) | Codeforces | Codeforces Round #189 (Div. 2) | 3 | |

248 | Maximum Absurdity | Codeforces | Codeforces Round #193 (Div. 2) | 3 | |

249 | Routine Problem | Codeforces | Codeforces Round #196 (Div. 2) | 3 | |

250 | Vasya and Public Transport | Codeforces | Codeforces Round #206 (Div. 2) | 3 | |

251 | Flag Day | Codeforces | Codeforces Round #207 (Div. 2) | 3 | |

252 | Permutation | Codeforces | Codeforces Round #209 (Div. 2) | 3 | |

253 | Levko and Permutation | Codeforces | Codeforces Round #210 (Div. 2) | 3 | |

254 | Dima and To-do List | Codeforces | Codeforces Round #214 (Div. 2) | 3 | |

255 | Valera and Contest | Codeforces | Codeforces Round #216 (Div. 2) | 3 | |

256 | Fox Dividing Cheese | Codeforces | Codeforces Round #218 (Div. 2) | 3 | |

257 | Sereja and Stairs | Codeforces | Codeforces Round #223 (Div. 2) | 3 | |

258 | Inna and New Matrix of Candies | Codeforces | Codeforces Round #234 (Div. 2) | 3 | |

259 | Sereja and Contests | Codeforces | Codeforces Round #235 (Div. 2) | 3 | |

260 | Domino Effect | Codeforces | Codeforces Round #238 (Div. 2) | 3 | |

261 | Garland | Codeforces | Codeforces Round #239 (Div. 2) | 3 | |

262 | Mashmokh and Tokens | Codeforces | Codeforces Round #240 (Div. 2) | 3 | |

263 | Art Union | Codeforces | Codeforces Round #241 (Div. 2) | 3 | |

264 | Megacity | Codeforces | Codeforces Round #242 (Div. 2) | 3 | |

265 | Pasha Maximizes | Codeforces | Codeforces Round #249 (Div. 2) | 3 | |

266 | The Child and Set | Codeforces | Codeforces Round #250 (Div. 2) | 3 | |

267 | Valera and Fruits | Codeforces | Codeforces Round #252 (Div. 2) | 3 | |

268 | Queue | Codeforces | Codeforces Round #279 (Div. 2) | 3 | |

269 | Modular Equations | Codeforces | Codeforces Round #282 (Div. 2) | 3 | |

270 | Secret Combination | Codeforces | Codeforces Round #283 (Div. 2) | 3 | |

271 | Error Correct System | Codeforces | Codeforces Round #296 (Div. 2) | 3 | |

272 | School Marks | Codeforces | Codeforces Round #301 (Div. 2) | 3 | |

273 | Order Book | Codeforces | Codeforces Round #317 [AimFund Thanks-Round] (Div. 2) | 3 | |

274 | Finding Team Member | Codeforces | Codeforces Round #320 (Div. 2) [Bayan Thanks-Round] | 3 | |

275 | Anton and Lines | Codeforces | Codeforces Round #329 (Div. 2) | 3 | |

276 | Spongebob and Joke | Codeforces | Codeforces Round #332 (Div. 2) | 3 | |

277 | Hamming Distance Sum | Codeforces | Codeforces Round #336 (Div. 2) | 3 | |

278 | Longtail Hedgehog | Codeforces | Codeforces Round #338 (Div. 2) | 3 | |

279 | Coat of Anticubism | Codeforces | Codeforces Round #349 (Div. 2) | 3 | |

280 | Pyramid of Glasses | Codeforces | Codeforces Round #354 (Div. 2) | 3 | |

281 | Mike and Shortcuts | Codeforces | Codeforces Round #361 (Div. 2) | 3 | |

282 | Spotlights | Codeforces | Technocup 2017 - Elimination Round 2 | 3 | |

283 | Hongcow Solves A Puzzle | Codeforces | Codeforces Round #385 (Div. 2) | 3 | |

284 | Santa Claus and Keyboard Check | Codeforces | Technocup 2017 - Elimination Round 3 | 3 | |

285 | Frodo and pillows | Codeforces | Codeforces Round #393 (Div. 2) (8VC Venture Cup 2017 - Final Round Div. 2 Edition) | 3 | |

286 | Code For 1 | Codeforces | Divide by Zero 2017 and Codeforces Round #399 (Div. 1 + Div. 2, combined) | 3 | |

287 | The Meeting Place Cannot Be Changed | Codeforces | ?????????? 2017 - ????? (?????? ??? ??????-??????????) | 3 | |

288 | Masha and geometric depression | Codeforces | Codeforces Round #407 (Div. 2) | 3 | |

289 | Sagheer, the Hausmeister | Codeforces | Codeforces Round #417 (Div. 2) | 3 | |

290 | Cutting Carrot | Codeforces | Tinkoff Challenge - Final Round (Codeforces Round #414, rated, Div. 1 + Div. 2) | 3 | |

291 | T-shirt buying | Codeforces | Playrix Codescapes Cup (Codeforces Round #413, rated, Div. 1 + Div. 2) | 3 | |

292 | T-Shirt Hunt | Codeforces | Codeforces Round #412 (rated, Div. 2, base on VK Cup 2017 Round 3) | 3 | |

293 | Petya and Exam | Codeforces | Codeforces Round #425 (Div. 2) | 3 | |

294 | Luba And The Ticket | Codeforces | Educational Codeforces Round 27 | 3 | |

295 | Black Square | Codeforces | Codeforces Round #423 (Div. 2, rated, based on VK Cup Finals) | 3 | |

296 | Mister B and Angle in Polygon | Codeforces | Codeforces Round #421 (Div. 2) | 3 | |

297 | Balanced Substring | Codeforces | Educational Codeforces Round 30 | 3 | |

298 | Lorry | Codeforces | Codeforces Beta Round #3 | 4 | |

299 | Center Alignment | Codeforces | Codeforces Beta Round #5 | 4 | |

300 | Running Student | Codeforces | Codeforces Beta Round #9 (Div. 2 Only) | 4 | |

301 | Young Photographer | Codeforces | Codeforces Beta Round #14 (Div. 2) | 4 | |

302 | Tournament | Codeforces | Codeforces Beta Round #27 (Codeforces format, Div. 2) | 4 | |

303 | Coins | Codeforces | Codeforces Beta Round #44 (Div. 2) | 4 | |

304 | Choosing Symbol Pairs | Codeforces | Codeforces Beta Round #47 | 4 | |

305 | Fortune Telling | Codeforces | Codeforces Beta Round #55 (Div. 2) | 4 | |

306 | Serial Time! | Codeforces | Codeforces Beta Round #56 | 4 | |

307 | Hard Work | Codeforces | Codeforces Beta Round #57 (Div. 2) | 4 | |

308 | Settlers' Training | Codeforces | Codeforces Beta Round #59 (Div. 2) | 4 | |

309 | Progress Bar | Codeforces | Codeforces Beta Round #65 (Div. 2) | 4 | |

310 | Depression | Codeforces | Codeforces Beta Round #69 (Div. 2 Only) | 4 | |

311 | Magical Array | Codeforces | Codeforces Beta Round #72 (Div. 1 Only) & Codeforces Beta Round #72 (Div. 2 Only) | 4 | |

312 | African Crossword | Codeforces | Codeforces Beta Round #74 (Div. 2 Only) | 4 | |

313 | Binary Number | Codeforces | Codeforces Beta Round #75 (Div. 2 Only) | 4 | |

314 | Choosing Laptop | Codeforces | Codeforces Beta Round #82 (Div. 2) | 4 | |

315 | Petya and Square | Codeforces | Codeforces Beta Round #85 (Div. 2 Only) | 4 | |

316 | Hopscotch | Codeforces | Codeforces Round #101 (Div. 2) | 4 | |

317 | Help Kingdom of Far Far Away 2 | Codeforces | Codeforces Round #102 (Div. 2) | 4 | |

318 | Meeting | Codeforces | Codeforces Round #103 (Div. 2) | 4 | |

319 | Lucky Mask | Codeforces | Codeforces Round #104 (Div. 2) | 4 | |

320 | Escape | Codeforces | Codeforces Round #105 (Div. 2) | 4 | |

321 | Steps | Codeforces | Codeforces Round #108 (Div. 2) | 4 | |

322 | Growing Mushrooms | Codeforces | Codeforces Round #118 (Div. 2) | 4 | |

323 | Counting Rhombi | Codeforces | Codeforces Round #119 (Div. 2) | 4 | |

324 | Walking in the Rain | Codeforces | Codeforces Round #121 (Div. 2) | 4 | |

325 | Square | Codeforces | Codeforces Round #122 (Div. 2) | 4 | |

326 | After Training | Codeforces | Codeforces Round #123 (Div. 2) | 4 | |

327 | Limit | Codeforces | Codeforces Round #124 (Div. 2) | 4 | |

328 | Little Elephant and Sorting | Codeforces | Codeforces Round #129 (Div. 2) | 4 | |

329 | Hometask | Codeforces | Codeforces Round #131 (Div. 2) | 4 | |

330 | Olympic Medal | Codeforces | Codeforces Round #132 (Div. 2) | 4 | |

331 | Forming Teams | Codeforces | Codeforces Round #133 (Div. 2) | 4 | |

332 | Special Offer! Super Price 999 Bourles! | Codeforces | Codeforces Round #135 (Div. 2) | 4 | |

333 | Well-known Numbers | Codeforces | Codeforces Round #139 (Div. 2) | 4 | |

334 | Two Tables | Codeforces | Codeforces Round #141 (Div. 2) | 4 | |

335 | Magic, Wizardry and Wonders | Codeforces | Codeforces Round #143 (Div. 2) | 4 | |

336 | Undoubtedly Lucky Numbers | Codeforces | Codeforces Round #150 (Div. 2) | 4 | |

337 | Chilly Willy | Codeforces | Codeforces Round #152 (Div. 2) | 4 | |

338 | Ancient Prophesy | Codeforces | Codeforces Round #158 (Div. 2) | 4 | |

339 | Dima and Sequence | Codeforces | Codeforces Round #167 (Div. 2) | 4 | |

340 | New Problem | Codeforces | Codeforces Round #170 (Div. 2) | 4 | |

341 | Pipeline | Codeforces | Codeforces Round #176 (Div. 2) | 4 | |

342 | Shaass and Bookshelf | Codeforces | Codeforces Round #178 (Div. 2) | 4 | |

343 | Eight Point Sets | Codeforces | Codeforces Round #194 (Div. 2) | 4 | |

344 | Xenia and Spies | Codeforces | Codeforces Round #199 (Div. 2) | 4 | |

345 | Resort | Codeforces | Codeforces Round #203 (Div. 2) | 4 | |

346 | Dima and Text Messages | Codeforces | Codeforces Round #208 (Div. 2) | 4 | |

347 | Inna and Nine | Codeforces | Codeforces Round #220 (Div. 2) | 4 | |

348 | I.O.U. | Codeforces | Codeforces Round #221 (Div. 2) | 4 | |

349 | Semifinals | Codeforces | Codeforces Round #222 (Div. 2) | 4 | |

350 | Multitasking | Codeforces | Codeforces Round #225 (Div. 2) | 4 | |

351 | Trees in a Row | Codeforces | Codeforces Round #236 (Div. 2) | 4 | |

352 | Marathon | Codeforces | Codeforces Round #237 (Div. 2) | 4 | |

353 | Sereja and Mirroring | Codeforces | Codeforces Round #243 (Div. 2) | 4 | |

354 | Balls Game | Codeforces | Codeforces Round #245 (Div. 2) | 4 | |

355 | Kolya and Tandem Repeat | Codeforces | Codeforces Round #253 (Div. 2) | 4 | |

356 | Wonder Room | Codeforces | Codeforces Round #266 (Div. 2) | 4 | |

357 | Friends and Presents | Codeforces | Codeforces Round #275 (Div. 2) | 4 | |

358 | ZgukistringZ | Codeforces | Codeforces Round #307 (Div. 2) | 4 | |

359 | Pasha and Phone | Codeforces | Codeforces Round #330 (Div. 2) | 4 | |

360 | Testing Robots | Codeforces | Codeforces Round #335 (Div. 2) | 4 | |

361 | Rebus | Codeforces | Codeforces Round #347 (Div. 1) & Codeforces Round #347 (Div. 2) | 4 | |

362 | Problems for Round | Codeforces | Codeforces Round #351 (VK Cup 2016 Round 3, Div. 2 Edition) | 4 | |

363 | Game of the Rows | Codeforces | Codeforces Round #428 (Div. 2) | 4 | |

364 | Race Against Time | Codeforces | Codeforces Round #438 by Sberbank and Barcelona Bootcamp (Div. 1 + Div. 2 combined) | 4 | |

365 | Binary Search | Live Archive | 2000 | Europe - Northeastern | 4 |

366 | Memory Manager | Codeforces | Codeforces Beta Round #7 | 5 | |

367 | Obsession with Robots | Codeforces | Codeforces Beta Round #8 | 5 | |

368 | Jumping Jack | Codeforces | Codeforces Beta Round #11 | 5 | |

369 | Hierarchy | Codeforces | Codeforces Beta Round #17 | 5 | |

370 | Checkout Assistant | Codeforces | Codeforces Beta Round #19 | 5 | |

371 | Equation | Codeforces | Codeforces Alpha Round #20 (Codeforces format) | 5 | |

372 | Bargaining Table | Codeforces | Codeforces Beta Round #22 (Div. 2 Only) | 5 | |

373 | pSort | Codeforces | Codeforces Beta Round #28 (Codeforces format) | 5 | |

374 | Sysadmin Bob | Codeforces | Codeforces Beta Round #31 (Div. 2, Codeforces format) | 5 | |

375 | Chess | Codeforces | School Personal Contest #1 (Winter Computer School 2010/11) - Codeforces Beta Round #38 (ACM-ICPC Rules) | 5 | |

376 | Martian Dollar | Codeforces | Codeforces Beta Round #40 (Div. 2) | 5 | |

377 | T-shirts from Sponsor | Codeforces | School Personal Contest #2 (Winter Computer School 2010/11) - Codeforces Beta Round #43 (ACM-ICPC Rules) | 5 | |

378 | Sum | Codeforces | Codeforces Beta Round #46 (Div. 2) | 5 | |

379 | Spoilt Permutation | Codeforces | Codeforces Beta Round #52 (Div. 2) | 5 | |

380 | Energy exchange | Codeforces | Codeforces Beta Round #62 | 5 | |

381 | Bets | Codeforces | Codeforces Beta Round #63 (Div. 2) | 5 | |

382 | Facetook Priority Wall | Codeforces | Codeforces Beta Round #67 (Div. 2) | 5 | |

383 | Colorful Field | Codeforces | Codeforces Beta Round #71 | 5 | |

384 | Friends | Codeforces | Codeforces Beta Round #76 (Div. 2 Only) | 5 | |

385 | Help Chef Gerasim | Codeforces | Codeforces Beta Round #78 (Div. 2 Only) | 5 | |

386 | Datatypes | Codeforces | Codeforces Beta Round #83 (Div. 2 Only) | 5 | |

387 | PFAST Inc. | Codeforces | Codeforces Beta Round #86 (Div. 2 Only) | 5 | |

388 | Permutations | Codeforces | Codeforces Beta Round #92 (Div. 2 Only) | 5 | |

389 | Martian Clock | Codeforces | Codeforces Round #106 (Div. 2) | 5 | |

390 | Surrounded | Codeforces | Codeforces Round #120 (Div. 2) | 5 | |

391 | Game on Paper | Codeforces | Codeforces Round #128 (Div. 2) | 5 | |

392 | Young Table | Codeforces | Codeforces Round #147 (Div. 2) | 5 | |

393 | Jury Size | Codeforces | Codeforces Round #155 (Div. 2) | 5 | |

394 | Convex Shape | Codeforces | Codeforces Round #168 (Div. 2) | 5 | |

395 | Nearest Fraction | Codeforces | Codeforces Round #172 (Div. 2) | 5 | |

396 | Calendar | Codeforces | Codeforces Round #183 (Div. 2) | 5 | |

397 | Continued Fractions | Codeforces | Codeforces Round #184 (Div. 2) | 5 | |

398 | Two Heaps | Codeforces | Codeforces Round #205 (Div. 2) | 5 | |

399 | Berland Bingo | Codeforces | Codeforces Round #217 (Div. 2) | 5 | |

400 | Making Sequences is Fun | Codeforces | Codeforces Round #219 (Div. 2) | 5 | |

401 | Candy Boxes | Codeforces | Codeforces Round #278 (Div. 2) | 5 | |

402 | Balancer | Codeforces | Testing Round #10 | 5 | |

403 | The Queue | Codeforces | Codeforces Round #398 (Div. 2) | 5 | |

404 | Cinema Cashier | Codeforces | Codeforces Beta Round #10 | 6 | |

405 | Platforms | Codeforces | Codeforces Beta Round #18 (Div. 2 Only) | 6 | |

406 | Party | Codeforces | Codeforces Beta Round #23 | 6 | |

407 | F1 Champions | Codeforces | Codeforces Beta Round #24 | 6 | |

408 | Traffic Lights | Codeforces | Codeforces Beta Round #29 (Div. 2, Codeforces format) | 6 | |

409 | String Problem | Codeforces | Codeforces Beta Round #33 (Codeforces format) | 6 | |

410 | Land Lot | Codeforces | School Personal Contest #3 (Winter Computer School 2010/11) - Codeforces Beta Round #45 (ACM-ICPC Rules) | 6 | |

411 | Smallest number | Codeforces | Codeforces Beta Round #51 | 6 | |

412 | Tyndex.Brome | Codeforces | Codeforces Beta Round #58 | 6 | |

413 | Harry Potter and the History of Magic | Codeforces | Codeforces Beta Round #60 | 6 | |

414 | Text Messaging | Codeforces | Codeforces Beta Round #64 | 6 | |

415 | Train | Codeforces | Codeforces Beta Round #68 | 6 | |

416 | Keyboard | Codeforces | Codeforces Beta Round #73 (Div. 2 Only) | 6 | |

417 | Very Interesting Game | Codeforces | Codeforces Beta Round #88 | 6 | |

418 | Wallpaper | Codeforces | Codeforces Beta Round #99 (Div. 2) | 6 | |

419 | New Year Cards | Codeforces | Codeforces Round #100 | 6 | |

420 | Polygons | Codeforces | Codeforces Round #113 (Div. 2) | 6 | |

421 | Wizards and Minimal Spell | Codeforces | Codeforces Round #114 (Div. 2) | 6 | |

422 | Plane of Tanks: Pro | Codeforces | Codeforces Round #115 | 6 | |

423 | Solitaire | Codeforces | Codeforces Round #130 (Div. 2) | 6 | |

424 | Easy Tape Programming | Codeforces | Codeforces Round #148 (Div. 2) | 6 | |

425 | Unsorting Array | Codeforces | Codeforces Round #153 (Div. 2) | 6 | |

426 | Vasily the Bear and Fly | Codeforces | Codeforces Round #195 (Div. 2) | 6 | |

427 | Maximal Area Quadrilateral | Codeforces | Codeforces Round #198 (Div. 2) | 6 | |

428 | Number Busters | Codeforces | Codeforces Round #224 (Div. 2) | 6 | |

429 | Red and Blue Balls | Codeforces | Codeforces Round #233 (Div. 2) | 6 | |

430 | Binary Search Tree | UVA | 6 | ||

431 | Laser | Codeforces | Codeforces Beta Round #15 | 7 | |

432 | Intersection | Codeforces | Codeforces Alpha Round #21 (Codeforces format) | 7 | |

433 | Codeforces World Finals | Codeforces | Codeforces Beta Round #30 (Codeforces format) | 7 | |

434 | Warehouse | Codeforces | Codeforces Beta Round #35 (Div. 2) | 7 | |

435 | Fractal | Codeforces | Codeforces Beta Round #36 | 7 | |

436 | Computer Game | Codeforces | Codeforces Beta Round #37 | 7 | |

437 | Repaintings | Codeforces | Codeforces Beta Round #39 | 7 | |

438 | Game of chess unfinished | Codeforces | Codeforces Beta Round #41 | 7 | |

439 | bHTML Tables Analisys | Codeforces | Codeforces Beta Round #48 | 7 | |

440 | Blog Photo | Codeforces | Codeforces Beta Round #49 (Div. 2) | 7 | |

441 | Martian Architecture | Codeforces | Codeforces Beta Round #53 | 7 | |

442 | Dark Assembly | Codeforces | Codeforces Beta Round #81 | 7 | |

443 | Before Exam | Codeforces | Codeforces Beta Round #90 | 7 | |

444 | Brand New Easy Problem | Codeforces | Codeforces Round #127 (Div. 2) | 7 | |

445 | Yaroslav and Two Strings | Codeforces | Codeforces Round #179 (Div. 2) | 7 | |

446 | Inna, Dima and Song | Codeforces | Codeforces Round #229 (Div. 2) | 7 | |

447 | Three matrices | Codeforces | Codeforces Round #230 (Div. 2) | 7 | |

448 | On Corruption and Numbers | Codeforces | Codeforces Round #232 (Div. 2) | 7 | |

449 | Rooks and Rectangles | Codeforces | VK Cup 2015 - Round 1 | 7 | |

450 | Decode | Live Archive | 1990 | North America - East Central NA | 7 |

451 | Letter A | Codeforces | Codeforces Beta Round #13 | 8 | |

452 | Cutting Jigsaw Puzzle | Codeforces | Codeforces Beta Round #50 | 8 | |

453 | Need For Brake | Codeforces | Codeforces Beta Round #66 | 8 | |

454 | Special Olympics | Codeforces | Codeforces Round #125 (Div. 2) | 8 | |

455 | Very Beautiful Number | Codeforces | Codeforces Round #231 (Div. 2) | 8 | |

456 | Divisibility Rules | Codeforces | Codeforces Round #116 (Div. 2, ACM-ICPC Rules) | 9 | |

457 | Fence | A2 Online Judge | 9 |